[PATCH] Add more opportunities for constant folding in ScalarEvolution.

[Nick Lewycky]

LGTM with comment.

================
Comment at: test/Analysis/ScalarEvolution/scev-mul-expr-fold.ll:53-62
@@ +52,11 @@
+
+!8 = metadata !{metadata !9, metadata !9, i64 0}
+!9 = metadata !{metadata !"pointer", metadata !10, i64 0}
+!10 = metadata !{metadata !"", metadata !11}
+!11 = metadata !{metadata !""}
+!12 = metadata !{metadata !12, metadata !13, metadata !"argument_scope"}
+!13 = metadata !{metadata !13}
+!14 = metadata !{metadata !15, metadata !15, i64 0}
+!15 = metadata !{metadata !"", metadata !10, i64 0}
+!16 = metadata !{metadata !16, metadata !17}
+!17 = metadata !{metadata !"llvm.loop.unroll.disable"}
----------------
I think you can safely drop all the metadata from this test?

http://reviews.llvm.org/D6487